/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.camera.async;

import javax.annotation.Nonnull;

/**
 * Wraps a {@link BufferQueueController} with reference counting.
 */
public class RefCountedBufferQueueController<T> implements BufferQueueController<T>
{
    private final RefCountBase<BufferQueueController> mBuffer;

    public RefCountedBufferQueueController(BufferQueueController<T> stream)
    {
        mBuffer = new RefCountBase<BufferQueueController>(stream, 1);
    }

    @Override
    public void update(@Nonnull T element)
    {
        mBuffer.get().update(element);
    }

    @Override
    public boolean isClosed()
    {
        return mBuffer.get().isClosed();
    }

    public void addRef()
    {
        mBuffer.addRef();
    }

    @Override
    public void close()
    {
        mBuffer.close();
    }
}
